What are Secrets?

[Alanfalcon]

Alanfalcon wrote: Personally, I like secrets to have coins in them.  Just a map, or just a backback, or just a shield are okay I guess, but then it is possible to get 100% score and NOT 100% secrets

So I followed my own advice here as I've been going back over Falcon Manor and updating some things.  I think now it would be impossible to get 100% score without also finding 100% secrets.  I could be wrong though.  I found also, going back, that I have been fairly inconsistent about what I marked as a secret and what I did not mark.  I tried to fix some of that, but I found that certain areas that I marked as

secret

in the Normal version of the mansion just didn't feel like they should be marked in the Hard version.  I wonder if anyone else feels the same way -- are the very obvious and easy

walk through walls to get this

secrets worth putting an S?  What about in the

Hard

version of a mansion?